Bertrand Russell's work on the foundations of mathematics apparently played a decisive role in persuading Wittgenstein to abandon his aeronautical engineering studies in favor of philosophy. Wittgenstein's influence on Russell turned out to be profound as well: two years after they first met, Wittgenstein had delivered an objection to Russell's theory of judgment that was so devastating that it led to the abandonment of a major philosophical project of Russell's, leaving him reportedly “paralysed”. Two fundamental elements are pivotal to the (...) logicism of Russell's Principles of Mathematics: his conception of a proposition, and his commitment to the doctrine of the unrestricted variable. In addition to the ontological problems facing his theory of propositions, Russell also became convinced that his ontology of propositions contained fundamental logical problems, as he encountered recurring contradictions in his attempts to formalize a propositional logic that would comport with his philosophical theory. (shrink)

Tractatus Logico-Philosophicus by Ludwig Wittgenstein: three parallel tree-structured editions. (1) Tree-structured arrangement of the German text, edited by David G. Stern, Joachim Schulte and Katia Saporiti. (2) Tree-structured arrangement of the English translation by Ogden and Ramsey, edited by David G. Stern. (3) Tree-structured arrangement of the English translation by Pears and McGuinness, edited by David G. Stern.

In the 1970s, Peter Hacker and Bernard Williams argued that Wittgenstein was a Kantian transcendental idealist. In the 1980s, Hacker officially rescinded this interpretation and Williams in any case regarded Wittgenstein's transcendental idealism as a philosophical mistake. And ever since, there has been a lively debate about Wittgenstein's Kantianism, anti‐Kantianism, or non‐Kantianism. No one doubts that throughout his philosophical writings, Wittgenstein saw a fundamental connection between language and human life. Jonathan Lear's critical judgment on the later Wittgenstein's transcendental anthropology is (...) that it is ultimately a failure, due to an incoherence between the prima‐facie‐opposed 'transcendental' and 'anthropological' levels of reflection. According to Kant, a mental representation is transcendental when it is either part of, or derived from, our nonempirical innately specified spontaneous cognitive capacities. Then Kant's transcendental idealism (TI) can be formulated as a two‐part philosophical equation: representational transcendentalism, cognitive idealism. (shrink)